Khan Academy: Calculating Contour Lines

This is a 7-problem quiz/practice calculating contour lines. We can We can create a surface based on the position of particles by treating each particle as a heat source and then drawing a line through each point that has a particular...

A video [4:05] about Winslow Homer, The Life Line, 1884 at the Philadelphia Museum of Art. The video is narrated by Khan Academy's Dr. Beth Harris and Dr. Steven Zucker.

Understand how we can calculate the radius of a circle of confusion

Join watercolour expert Mike Chaplin in a short lesson on the fundamentals of painting: line, tone, and colour. In this video, learn about drafting, designing, and establishing rhythm with lines, which are used for more than just...

In this video [2:30] Met curator Sheila Canby on the economy of line in "Groom and Rider" from Tabriz, Iran, 1540-50. The subject of horseman and groom is common in Safavid art. The rider's handsome appearance and elegant posture embody...

Next we need to throw away the slope-intercept form and use the line equation instead. Click here to see why dividing by zero is bad. Click here to try the interactive program shown in the video.

In "The Gare Saint-Lazare, the Auteuil Line" Monet shows his keen interest in light, color, and paint handling. This painting has been singled out as among the most impressive paintings of Impressionism. View this picture and read about...

Located in the desert on the South Coast of Peru, the Nasca Geoglyphs are among the world's largest drawings. Also referred to as the Nasca Lines, they are more accurately called geoglyphs, which are designs formed on the earth. View...

First we'll use the slope intercept form of a line to define each frame along a straight line.

Using the diagram provided, calculate where a ray of light coming through a pinhole hits an image plane.